Kim Kardashian’s rise to fame all started out with the infamous sex tape with R&B singer Ray J… while she was still married to her first husband, Damian Thomas.

Ray J alleges in his new book, Death of a Cheating Man: What Every Woman Must Know About Men Who Stray, that Kardashian pursued him while she was still married to her music producer husband.

“To be honest, the whole thing started off wrong,” Ray J says, who’s recently been linked to the late Whitney Houston. “We’d known each other for a while before we dated and there was a mutual attraction, but she was married… She let me know she wanted to get with me. She left her husband for me as soon as we started having sex and things between us got intense really fast. After that, I felt obligated to be with her.”

He also goes on to say that the relationship was highly sexual.

“We were like animals; sexually free to try anything, and we did. For years KK and I had a great sex life. There was more to our relationship, but the majority of it was about our wild and extreme sexual chemistry. She was a straight freak who was down to do whatever, whenever and that seriously hypnotized me,” Ray J writes.

He also claims that both he and KK cheated on each other and the relationship eventually fell apart due to KK’s jealousy. According to Ray J, she tapped his phone to see who called him.

Kardashian’s apparently very upset. A source tells Life & Style, “Kim’s putting on a brave face, but she’s furious about Ray J cashing in on her. There’s so much that has gone wrong for her this year—he’s just another person trying to humiliate her.”